Consolidated Statesments of Comprehensive Income (Parentheticals) (USD $)	12 Months Ended
Sep. 30, 2013	Sep. 30, 2012
Net change in unrealized appreciation of investments, taxes	$ 13,544,000	$ 9,991,000
Reclassification adjustment of other-than-temporary impairment losses recognized in net income, taxes	$ 668,000	$ 1,135,000

Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e640-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (e,f)

-URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration